ST662ACD データシートの表示（PDF） - STMicroelectronics

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ST662ACD

DC-DC CONVERTER FROM 5V TO 12V, 0.03A FOR FLASH MEMORY PROGRAMMING SUPPLY

STMicroelectronics 

ST662A

HOW TO INCREASE OUTPUT CURRENT OR

OUTPUT VOLTAGE CAPABILITY

Current capability is limited by Ron of internal

switches. It is possible to increase it connecting in

parallel two or more ST662A devices; each one

of them can supply 30mA. The figure 6 shows the

electric schematic. The capacitors C3, C4 and C5

must be placed very close to the ICs on the

board. If this is not possible, you can place two

different capacitors, each of them of half value,

very close to the respective integrated circuit.

Fig. 8 show the Output Current capability of the

proposed circuit.

If an output voltage greater than 12V is required,

it’s possible to realize the circuit of the following

diagram (figure 7). The relevant Output Current

capability is shown in figure 9 in which is shown

the output voltage vs load current.

Figure 6: Application Circuit for Two ST662A in Parallel

Table 2: List of Components

CAPACITOR

C1A

C2A

C1B

C2B

C3

C4

C5

TYPE

Ce r am ic

Ce r am ic

Ce r am ic

Ce r am ic

Electrolyt ic Tantalum

Electrolyt ic Tantalum

Ce r am ic

VALUE (µF)

0.22

0.22

0.22

0.22

10

10

0.22

8/12

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